#include<fstream>
#include<string>
#include<vector>
 
using namespace std;
 
ifstream in("strmatch.in");
ofstream out("strmatch.out");
 
int main()
{
    string m,n,p;
	char z;
    vector<int> b;
    in>>m>>n;
    int i=0,I=1,M=m.length(),N=n.length();
    while(m.at(0)!=m.at(I)) I++;
	p=m.substr(0,I);
	z=m.at(0);
    while(i<N-M+1)
    {
        if(n.at(i)==z&&n.substr(i,I)==p)
        {
            if(n.substr(i,M)==m) b.push_back(i);
            i+=I;
        }
        else i++;
		while(i<N-M+1&&n.at(i)!=z) i++;
    }
    out<<b.size()<<'\n';
    for(i=0;i<b.size()&&i<1000;i++) out<<b.at(i)<<" ";
}